[ https://issues.apache.org/jira/browse/YARN-1799?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sunil G reassigned YARN-1799:
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Assignee: Sunil G
> Enhance LocalDirAllocator in NM to consider DiskMaxUtilization cutoff
> ---------------------------------------------------------------------
>
> Key: YARN-1799
> URL: https://issues.apache.org/jira/browse/YARN-1799
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: nodemanager
> Affects Versions: 2.3.0
> Reporter: Sunil G
> Assignee: Sunil G
>
> LocalDirAllocator provides paths for all tasks for its local write.
> This considers the good list of directories which are selected by the HealthCheck mechamnism
in LocalDirsHandlerService
> getLocalPathForWrite() considers whether input demand "size" can meet the "capacity"
in "lastAccessed" directory.
> If more tasks asks for path from LocalDirAllocator, then it is possible that the allocation
is done based on the current disk availability at that given time.
> But this path would have earlier given to some other tasks to write and they may be sequentially
doing writing.
> It is better to check for an upper cutoff for disk availability
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